* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

a {
    text-decoration: none;
}

li {
    list-style: none;
}


/* 1.导航 */

.nav {
    width: 100%;
    background-color: #222;
    height: 50px;
}

.nav>a {
    display: block;
    width: 20%;
    height: 100%;
    float: left;
    text-align: center;
    line-height: 50px;
    font-size: 14px;
    color: #fff;
}


/* 2.内容 */

.content {
    margin: 0 auto;
    margin-top: 10px;
    width: 98%;
    overflow: hidden;
}

.left {
    float: left;
    width: 69.5%;
    height: 100%;
}

.left_top {
    padding: 10px 60px;
}

.left_top>img {
    width: 100%;
}

.left_bottom h1 {
    margin-left: 7%;
}

.left_bottom ul {
    margin: 0 1%;
}

.left_bottom li {
    float: left;
    padding: 1% 5%;
    width: 33.3%;
    height: 250px;
    text-align: center;
}

.left_bottom li img {
    width: 100%;
}

.right {
    float: right;
    width: 29.5%;
    height: 100%;
    text-align: center;
}

.right ul {
    margin-bottom: 20px;
}

.right ul li {
    width: 100%;
    height: 40px;
    line-height: 40px;
    border: 1px solid #ccc;
}

.right ul li:nth-child(1) {
    background-color: #ccc;
}

.right dl dt {
    width: 100%;
    height: 40px;
    line-height: 40px;
    border: 1px solid #ccc;
    background-color: #ccc;
}

.right dl dd {
    width: 100%;
    height: 100px;
    padding: 2% 5%;
    line-height: 100px;
    border: 1px solid #ccc;
}

.right dl dd a {
    float: left;
    display: inline-block;
    width: 60%;
    height: 100%;
}

.right dl dd a img {
    height: 100%;
}

.foot {
    margin-top: 20px;
    height: 100px;
    width: 100%;
    padding: 0 1%;
}

.foot span:nth-child(1) {
    float: left;
}

.foot span:nth-child(2) {
    float: right;
}